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Новости за 02.12.2024

Ultrafast dissociation of molecules studied at BESSY II

Sciencedaily.com 

An international team has tracked at BESSY II how heavy molecules -- in this case bromochloromethane -- disintegrate into smaller fragments when they absorb X-ray light. Using a newly developed analytical method, they were able to visualize the ultrafast dynamics of this process. In this process, the X-ray photons trigger a 'molecular catapult effect': light atomic groups are ejected first, similar to projectiles fired from a catapult, while the heavier atoms -- bromine and chlorine -- separate more slowly.

Revisiting vitamin D guidelines

Sciencedaily.com 

In June of 2024, the Endocrine Society, influenced by a substantial body of research conducted in recent years, published new clinical practice guidelines for the testing and supplementation of Vitamin D for the prevention of disease. These new recommendations included limiting vitamin D supplementation beyond the daily recommended intake to specific risk groups and advised against routine 25-hydroxyvitamin D [25(OH)D] testing in healthy individuals.

Temporary tattoo printed directly on the scalp offers easy, hair-friendly solution for measuring brainwaves

Sciencedaily.com 

Scientists have invented a liquid ink that doctors can print onto a patient's scalp to measure brain activity. The technology offers a promising alternative to the cumbersome process currently used for monitoring brainwaves and diagnosing neurological conditions. It also has the potential to enhance non-invasive brain-computer interface applications.

Ketone bodies: More than energy, they are powerful signaling metabolites that clean up damaged proteins

Sciencedaily.com 

Ketone bodies are not just about energy. These metabolites are powerful signaling molecules that have profound effects on the proteome and protein quality control in the brain. Scientists, working in mouse models of Alzheimer's disease and aging, and in the nematode C. elegans, reveal the ketone body -hydroxybutyrate interacts directly with misfolded proteins, altering their solubility and structure so they can be cleared from the brain through the process of autophagy. The work hints at a tantalizing... Читать дальше...

Biden pardons son Hunter

The Week 

Joe Biden has spared his son Hunter a possible prison sentence for felony gun and tax convictions

2024 MLS Playoff Glance

Wtop.com 

All Times EDT Wild Card Eastern Conference Tuesday, Oct. 22: Montreal 2, Atlanta 2, Atlanta wins 5-4 on penalty kicks…

Hidden DNA in plants reveals secrets of photosynthesis

Phys.org 

Scientists have uncovered genetic variation in the unexplored DNA of the photosynthetic and energy factories of Arabidopsis plants, which plays a crucial role in the efficiency of photosynthesis in plants. These insights—published Nov. 27 in the Proceedings of the National Academy of Sciences—pave the way for more productive, climate-resilient crops that could contribute to sustainable global food security.

Why defence manufacturing is still struggling to take off even after 10 years of 'Make in India'

Economictimes.indiatimes.com 

India's 'Make in India' initiative for defence manufacturing has encountered challenges despite reforms. For better results, foreign defence OEMs need to be allowed 100% control in subsidiaries. Recently, approval was granted for a foreign OEM's 100% FDI subsidiary, which will be watched closely. These changes could boost India's defence manufacturing and exports.